Bowl liners for crushers



July 18, 1961 Filed Feb. 24, 1959 G. W. BEHNKE ETAL BOWL LINERS FOR CRUSHERS 3 Sheets-Sheet 1 HTTORNE'KS July 18, 1961 G. w. BEHNKE ETAL 2,992,784

BOWL LINERS FOR CRUSHERS Filed Feb. 24, 1959 3 Sheets-Sheet 2 Jnvo l'ou, Hans 1. W/r/h Gear; 5 e/igz/ e HTTORNEKS July 18, 1961 G. w. BEHNKE ETA]. 2,992,784

BOWL LINERS FOR CRUSHERS Filed Feb. 24, 1959 3 Sheets-Sheet 3 United States Patent 2,992,784 BOWL LINERS FOR CRUSHERS George W. Behnke and Hans A. Wirth, Durand, Mich, assignors to Simplicity Engineering Company, Durand, Mich., a corporation of Michigan Filed Feb. 24, 1959, Ser. No. 795,268 7 Claims. (Cl. 241275) This invention relates to crushers of the impact type, and more particularly to the bowl liner of the crusher against the face of which the material is thrown, at high speed, by the crusher impellers, the liner face being substantially normal to the trajectory of the impelled material.

One of the prime objects of the invention is to design a fabricated crusher bowl liner against which the material is thrown and in which it is packed as the device begins to operate, continued operation after the liner is packed, providing a material against material crushing action, minimizing wear on the material engaging parts, and further providing a rough surface to facilitate the crushing action.

Another object is to design a crusher and fabricated bowl liner for crushing, by impact, previously processed lightweight and other aggregates to produce crushed material of required size and consistency much more rapidly and far more economically than heretofore possible.

A further object is to design a fabricated bowl liner comprising a plurality of individual liner sections; secured in abutting interlocking circumferential arrangement, which are relatively economical to fabricate, assemble, and install, and which are removable from the bowl without removal of the impeller assembly or other parts of the crusher mechanism.

A still further object is to provide a rugged, practical, economical crusher bowl liner in which the material packs as the machine begins to operate, so that the face of the packed material forms the crushing wall, thus providing a material against material contact, and eliminating abrasive material against metal contact and rapid wear resulting therefrom.

Crusher bowl liners of the type herein referred to are subjected to severe abrasive action and wear, so that the problem of maintenance and replacement presents an expensive, time consuming operation, with considerable down time required for replacement, repair and/or adjustment of the various liner sections. We have designed a sectional bowl liner composed of a plurality of individual sections, each section having a plurality of circumferentially disposed, inwardly projecting ribbed sections, including vertical end ribs of simple, practical and inexpensive construction, these liners being easily and quickly applied and/or removed.

With the above and other objects in view, the present invention consists in the combination and arrangement of parts, hereinafter more fully described, illustrated in the accompanying drawings, and more particularly pointed out in the appended claims, it being understood that changes may be made in the form, size, proportion and minor details of construction, without departing from the spirit, or sacrificing any of the advantages of the invention.

In the drawings:

FIG. 1 is a side elevational view, on a reduced scale, showing the crusher and driving mechanism.

FIG. 2 is an enlarged, vertical sectional view of the mechanism, the arrows indicating the direction of flow of the material, and the packing of the material in the impellers and liner, the broken lines illustrating the adjustment of the table.

FIG. 3 is a partly sectional, plan view of the bowl ice liner taken on the line 3-3 of FIG. 2, parts being broken away to show the material packed in one of the buckets.

FIG. 4 is an enlarged, transverse, sectional view through one of the liner sections.

FIG. 5 is an enlarged view looking at the face of one of the liner segments.

FIG. 6 is a plan view thereof showing also a fragmentary portion of another liner segment.

FIG. 7 is a top plan view of the crusher.

Referring now more specifically to the drawings in which is shown the preferred embodiment of our invention, and in which like numerals indicate like parts throughout the several views thereof, the letter G indicates generally the crusher housing which includes a preferably cylindrical bowl section 10, having an upper flange 11, on which a cover plate 12 is secured by means of bolts 13.

A preferably cylindrical material receiving hopper 14 is mounted on the cover 12, and opens into a throat member 15, which is in communication with an impeller assembly I. The lower end of the bowl 1%) is open as shown, and is flanged as at 15 to accommodate bolts 17 for attachment or anchorage to a foundation or other support (not shown).

Upwardly and inwardly inclined arms 18 are provided in the lower end of the bowl 10, and at their junction provide a bearing support 19 which accommodates a bearing 20, in which a centrally disposed drive shaft S is journalled.

Upwardly and inwardly inclined arms 21 are provided on the cover plate 12, and at their junction provide a bearing support 22, in which a bearing 23 is mounted, and a shaft S extends therethrough. A drive pulley 24 is mounted on the upper end of the shaft S, and is drivingly connected to a drive pulley 25 provided on motor M by means of a belt 26, the motor being mounted on a base 27 which is adjustable with relation to the crusher structure by manipulation of screws 28 and 29 to properly tension the driving means.

A flat disc 30 is mounted on the shaft S, as shown, and a plurality of circumferentially spaced impeller buckets 31, held in place by means of bolts 32, are mounted on said disc, the bolts 32 projecting through a flat, upper disc ring 33, which is secured on the upper walls of the buckets, all as clearly shown in FIG. 3 of the drawings, the front end of each bucket being open so that the material fed from hopper 14 to said buckets is impelled outwardly therefrom as the crusher is driven.

A vertically adjustable table 34 surrounds the shaft S and is supported in position by means of a plurality of hanger brackets (one only being shown in the interest of clarity) 35 secured to the arms 21 by means of bolts 36 extending through slotted openings 36a provided in the arms 21, or in any other desired manner. Horizontally disposed stays 37 prevent lateral movement of the table.

All of the above, with the exception of the specific liner member L constitutes the subject matter of a separate application for patent filed February 3, 1959, Serial No. 790,929 by Messrs. Wirth, Briggs, Kittle and Judson, entitled Orusher Apparatus and Method of Crushing Aggregates, the instant invention being directed to the crusher bowl liners, and the construction thereof.

The bowl liner L is preferably formed of a plurality of individual members 3 8 as clearly shown in FIGS. 4, 5 and 6 of the drawings, each section being preferably fabricated with the back wall 39 curved as shown to snugly fit the curvature of the interior of the bowl 1t). Radial-1y disposed vertical end plates 40 and 41 are welded to the inner face of back plate 39; the end plate 4-0 being turned as at 42 and Welded to the wall 39, while the plate 41 is bent inwardly as at 43, with the end edge thereof being butted against and welded to the back plate, at a point spaced inwardly from the edge of the wall 39. A rib cut-out 44, flush with the one end of wall 39, provides a shouldered edge E in which the flanged section 42 of the adjacent section engages to provide an interlocking construction.

A plurality of vertically spaced, inwardly projecting plates 45 are welded to the inner face of the back plate 39, and an angularly shaped bottom plate 46 is welded to the lower face of the lowermost plate, and thence extends inwardly parallel with the plates 45. A vertically disposed member 47 is welded to the free end of each bottom plate 46, thus forming one complete liner section, the edges of which fit in butting relation, with the adjacent sections. Lugs 48 are welded to the back plate at the upper and lower edges for reinforcing purposes, and L- shaped liners '49 are secured on the inner face of the bowl and form, with the bowl liner, a track for securing the liner sections in position.

These individual sections 38 are placed in interlocking edge-to-edge relation in the bowl to provide a continuous liner, the lower edge of the back plates 39 being mounted in the groove 50, formed by the track liners 49, and the inner face of the bowl.

The material to be processed is fed to the hopper 14 and builds up a funnel-shaped body of the aggregate material A in the hopper, so that the material flows over this aggregate material, thence downwardly and onto the face of table 34, thence overflowing into the path of travel of the impeller buckets 31, which impel the material against the liners 38, as the crusher is driven.

When the crusher is started, the impelled material first packs in the spaces between the ribs and end plates, all as shown in FIGS. 2 and 4 of the drawings; and after the material is solidly packed in these sections, the continued operation of the mechanism throws or impels the material against the face of the material built up in the liners, thus providing a material against material impact; minimizing wear on the liners, and providing much more effective crushing action with a minimum of abrasive contact with the liner metal. This insures long life and efilcient crushing with a minimum of maintenance.

The individual sections are also readily removable Without dismantling the crusher, openings 51 being provided in the cover plate 12, and covers 52 forming removable closures for said openings. The covers 52 are provided with handles 53 for easy removal, and when the covers are removed, any desired liner section can be easily and quickly repaired, removed and/or replaced.

The crusher is adaptable for reducing materials such as gravel, cinders, stone, rock, ore, and many other materials of various classifications.

While we have described one form of the invention in detail, it will be understood, that modifications may be made within the scope of the invention as defined in the claims.

What we claim is:

1. A crusher bowl liner comprising a back plate shaped to the curvature of the inside diameter of the bowl, a pair of spaced apart end plates, and a plurality of inwardly projecting, horizontally disposed spaced apart plates welded to said back plate and end plates respectively, to form a plurality of pockets therebetween.

2. The combination defined in claim 1 in which the liner comprises a plurality of individual sections secured together in interlocking relation, and means in said bowl for supporting the sections in circumferentially arranged relation.

3. The combination defined in claim 1 in which the lower plate is stepped downwardly at a point spaced forwardly from the back plate and is of greater width than the remaining plates, and an upstanding band of less height than the step provided on the free end of said stepped section.

4. The combination in accordance with claim 1 in which an L-shaped member secured on the inner face of the bowl liner to form a groove to accommodate the lower edges of the back plates therein.

5. Crusher apparatus comprising; crusher bowl means; rotary means therein for throwing off material laterally outwardly; means for feeding material to said rotary means; means for driving said rotary means; a bowl liner mounted by said bowl means laterally opposite the rotary means for receiving material laterally impelled toward the liner; said liner comprising a plurality of circumferentially side-by-side liner sections including individual back plates mounted on the bowl, end plates projecting radially inwardly from said back plates, and a plurality of inwardly projecting, horizontally spaced apart plates fixed to said back plates and end plates, respectively, at a spaced distance below the upper edge of said liner generally radially opposite the means for impelling material to form a plurality of individual, circumferentially side-by-si-de pockets in which material can collect.

6. The combination defined in claim 5 in which a bottom plate for each liner section extends a substantial distance radially inward of said horizontally spaced apart plates.

7. The combination defined in claim 6 in which said bottom plate includes a generally vertically extending portion connecting to the radially inner edge of the lowermost of said horizontally spaced apart plates.

References Cited in the file of this patent UNITED STATES PATENTS 1,941,770 Welsford Jan. 2, 1934 2,012,694 Runyan Aug. 27, 1935 2,568,208 Pattinson Sept. 18, 1951 2,707,314 .I-Iorth May 3, 1955 2,801,803 Borman Aug. 6, 1957 FOREIGN PATENTS 376,760 Great Britain July 5, 1932 521,071 Canada Jan. 24, 1956 902,258 France Nov. 27, 1944 943,389 Germany May 17, 1956 OTHER REFERENCES Welding Revolutionizes Manufacturing, from The Iron Age, June 19, 1930, pages 1818-1820 and 1868. 

